Rotary swaging or forging machines



Feb. 16, 1954 S. SMITH BY /I/Mwl Www A Trae/wens' Patented Feb. 16, 1954ROTARY SWAGING R FORGING MACHINES samuel smith, Elmaon, EnglandApplication November 22, 1950, Serial No. 197,016

Claims priority, application Great Britain December 2, 1949 4 claims.(o1. '1s- 22) The present invention has relation to rotary swaging orforging machines adapted kfor hot forging or swaging of round andnon-round bars, points, tangs, spikes and the like, more particularlythose of the type in which a stationary -spindle or central die head isprovided with radially displaceable die blanks which are acted upon by arotatable flywheel or like device mounted upon the spindle or centraldie head with the intermediary of a plurality of circumferentiallydisposed rollers, and the present` invention has for its object toprovide such a machine of generally increased eilciency and utility.

According to the present invention there is provided a machine of thetype aforesaid incorporating a plurality of rollers certain of which arerecessed the arrangement being such that certain non-recessed rollersshall operate the displaceable dies whilst other recessed rollers shallpass inoperatively over complementary dies the dies thereby beingactuated alternately in pairs during the operation of the machine.Conveniently'four die blanks with associated hammer blocks may bemounted in the slots in the stationary spindle or die head in rightangle relationship and twelve rollers may be used in the track alternaterollers being grooved so that two aligned dies are actuatedsimultaneously by non-grooved rollers whilst grooved rollers pass overthe remaining two hammer blocks, these last being struck when the firstmentioned dies have done their work.

In order that the invention may be clearly understood and readilycarried into practice reference may be had to the appended explanatorydrawings in which:

Figure 1 illustrates in vertical sectional elevation the pertinent partof `a rotary swaging machine constructed according to the presentinvention and Figure 2 is a vertical section elevation through themachine taken at right angles to the plane of Figure 1.

In a convenient embodiment of the present invention there is provided arotary swaging or forging machine having a stationary spindle or diehead a which is cross slotted at a1 (Figure 2) for the reception of diesb, hammer blocks b1 and Wedges c well known in the art. Surrounding thisstationary spindle or die head a intermediately of the rollers d, d1 isa rotatable flywheel e or like device, the arrangement being such thaton the rotation of the flywheel e the A rollers d operate the dies,which in turn shape the article. In the present invention the rollers d,d1 are journaled at d2 in the rotatable ywheel e or they may contacteach other without end journals d2 and each alternate roller d1 isgrooved, as shown, so that it operates in its track in the normal mannerbut misses the hammer blocks b1 whereas other alternate rollers d areplain and strike the hammer blocks b1. Twelve rollers are advantageouslyutilised, as illustrated, to ll or substantially fill the track so thatwhen two plain rollers d are contacting hammer blocks b1 in alignment,grooved rollers d1 are disposed adjacent the hammer blocks at rightangles thereto. These latter hammer blocks are contacted in turn by theplain rollers d and the grooved rollers come opposite the firstmentioned hammer 'blocks b1; in this manner cross alternating blows arestruck by the hammer blocks. Twelve, twenty or twentyeight rollers maybe used as the machine size increases, the rollers being in multiples offour.

In order to restrict the outward movement of the hammer blocks b1 sothat they do not foul the non-striker rolls d1 there is inserted a sidekey or cotter f in a suitable slot half of which is in the hammer blockb1 and half in the head a, the side cotter extends from front to back ofthe hammer and is proportioned so that it restricts the outward throw ofthe hammer b1. To maintain pressure between the annular rolls and thedies there are interposed taper wedges c between the dies b and hammersb1. The wedges are controlled from the back end of the spindle by meansof an adjustable tubular carrier c1 or alternatively may be pedaloperated when used to obtain a steep reduction such as forging the tangon a flat le. In this class of Work it is an important feature of thisinvention that the pressure wedges would be applied only to the pair ofdies which make the steep reduction on the tang. The spindle of themachine is hollow and provision may be made to introduce a blast of airfrom a motor driven blower or centrifugal fan mounted at the rear of themachine in order to expel scale from the machine.

In order to minimize the amount of scale likely to enter the workingparts there may be extended the front end of the dies beyond the dieretaining plate so that the first impact of the dies on the Work breaksthe scale which falls clear of the Working parts.

I claim:

1. In a device of the class described, in combination, a stationarytubular spindle serving as an axle, said spindle having a plurality oftransverse slots, a swaging die, a hammer and an adjusting wedgeslidably mounted in each of said slots, a roller raceway surrounding thespindle and extending axially beyond each side of the transverse slots,a plurality of rollers having cy lindrical portions rolling on theraceway, alternate ones of said rollers being spool shaped and theremaining rollers being straight cylinders, a second v`racen/ay Lsurrounding and g journaled 'on said plurality of rollers, a flywheelsurrounding and carried on the second raceway, said swaging hammershaving end portions protruding int,0., the path of the straightcylindrical rollers.wh1: by all of said rollers serve to journal theflywlkieel and the straight rollers only cooperate with the swaginghammers.

2. In a device of the class,describedhin;come bination, a stationarygenerally tubularA spindleserving as an axle, said spindlalllayingwwat,leash one transverse slot, a pair of swaging dieslafpair of hammers,and a pair of adjustableuwedges,"

slidably mounted in the transverse slot symmetrically withrespect to theaxis of the spindle, a' roller raceway surrounding the spindle andextending axially'beyond 'each'` side of the transverse slot,` aplurality of rollers having cylindricalportions rolling on the raceway,alternate ones otrsaidnrollers ybeing)spc'noljshaped andtheremainingdrollersbeing straight cylinders, a secondlraceway surroundingyland journaled on said plurality'ofwrollers, a rilywheel surrounding andcefiiedethe .Seomi raeway, Said swasins ham- 'ma'slnv'ins-fena.mationsprotruding into the Re 11, ,Gi the .Straight .Cylindrical rollerswhereby allemal@ rellers. .Serve to, Journal theflywheel and thestraightrollersonly cooperate with the "e oidthe class described, in cornonarytubularl spindle serving .as

` an saidjspindlehaving more kthan one, diamllllS-f,,@Qpallofwgllg dies,a, Pair 0f hammerafand., a stablev Wedges. mounted in` each, desarrolla.raeway Surrounding .thespin- 'die,and'extendingvfaxiallybeyond eachsideof the slotsL a, pluredit-,yj ofi.. rollers .l having Y cylindricalportions rolling on the raceway, alternate ones of said rollers beingspool shaped and the remaining rollers being straight cylinders, thetotal number of said rollers being an odd multiple of the total numberof hammers, a second raceway. surrounding-and journaled onithe rollers,a flywheel carried Afon the second raceway, and means for driving theywheel, said hammers having portions extending into the path of the,straightmollers, whereby all of said rollers serve n plurality oirollers comprising an even number ofstraight cylindrical rollersalternating. with an even number of spool shapedvrcller-s and allrunning on the raceway, said hammers having :portions extending into thepath or the straight rollers to be Voperated thereby, a second racewayjournaled or 1 ,the plurality of lrollers, a iiywheel mountedI on the:second-raceway and meansfor driving tl ie flywheel,- whereby saidswaging dies are operatedby the passage of the straight rollers and 'all4or said rollers 'cooperate-torsupport the flywheel,

' SAMUEL SMIT-H.

Referencesitedfin the .le ofthis patent UNITED `S'lIAIIS- `PATENTSFOREIGN PATENTS Number Country Dalle 622,389. Great Britain .-e--.--.-.May v2,V 1949

